Insulator-pin.



J. LHEQHT & J. o. GAPBN.

' INSULATOR Pm APPLICATION FAILED AUG. 4, 1911.

1,094,852. Patented Apr. 2 8, 1914.

UNITED STATES PATENT OFFICE.

JULIUS L. HECHT, OF EVANSTON, .AND JOTHAM C. GAPELL OF OAK PARK,ILLINOIS,

ASSIGNORS OF ONE-HALF T0 ELECTRIC SERVICE SUPPLIES COMPANY, QF PHILA-DELPHIA, PENNSYLVANIA, A CORPORATION 0F NEW JERSEY.

INSULAT OR-PIN.

Specification of Letters Patent.

Application tiled August 4, 1911.

To UZ] Awhom 'it may concern.'

Be it. known that we, J ULIUs L. HECHT, a resident ot Evanston, in thecounty of Cook and State of Illinois, and J oTHAM C. GAPEN, aresidentot' Oak Park, in the county of Cook and State of Illinois,citizens of the United States, have invented new and useful Improvementsin Insulator-Pins, of which the following is a full, clear, concise, andexact description, reference being had to the accompanying drawing,forming a part of this specification.

lOur invention relates to improvements in insulator pins of that classin which is provided a strain taking base, heldl in .position by a boltpassing through the cross arm, which bolt is adapted to receive theinsulator.

One of the objectsof our invention is to provide a pin of this typewhich may besecured upon the cross arm of the conductor carrying poleprior to the erection of the pole, in position to receive the insulatorafter the pole has been erected.

It is a further object of our invention to provide an insulator pin ofthis type of such construction that the insulator may be rotated to anyposition even. though the base portion is Xed, so that the conductorreceiving groove in the insulator will be in valinement withthe'conductor.

.For the purpose of disclosing our invention we have illustrated oneembodiment thereof in the accompanying drawings.

Insaid drawings Figure l is a transverse sectional view ot' an insulatorpin constructed according to our invention and shows the supporting pinattached to a cross arm; F ig.

2 is a perspective view showing the pin mounted on a cross arm.

In the construction illustrated we provide a base member l whichpreferably consists Y of a hollow tubular portion provided with taperingangularly disposed strengthening ribs 2. The hollow base portionterminates in a rectangular bottom 3 which is somewhat curved orinclined in transverse section as shown in Fig; 1. This curvature notonly acts as a water shed to shed the rain or moisture, but also permitsthe bottom to fitover the curved or rounded top on the cross arm t andplaces the strain on the outer edges of the cross arm. The rectangularbottom is provided with a paiiuot downwardly extending lips 5 which fitover the 55 sides of the cross arm to prevent the base lower end as at 6to receive the securing nut 7. The upper end of the bolt 5 is provided"with a collar S arranged during .the erection ot the pole to engage aninternal annular flange E) formed in a recess'lO in the base o5 member."We have shown the collar 8 as being integrally formed with the bolt 5,butv it will be understood that any form of collar may be used ifdesired. as for instance, a nut may be secured upon the threaded portion11 I0` of the bolt.A The bolt 5', at its upper end, is threaded as at 11to receive the threaded thimble 12 of the insulator 13.

"We have shown in the drawing the collar S in the position which itfinally assumes 'I5 after the insulator has been secured upon the pin.In this position it willbe notedy there is a slight clearance betweenthe collar 8 und the annular flange 9. This clearance is particularlyprovided so that the thimble 12 80 of the insulator will engage theupper surface of the support 1 in order to insure as much ot the lateralstrain as is possible being taken by the support and to relieve as muchas possible the bolt 5 from any-lateral 85;y

strain. In securing the base 1 to the cross arm prior to the erection ofthe pole.l however, it is customary to have the collar engage theannular tiange 9 in thebase member to hold the base member in positionuntil after the pole has been erected and the insulator secured inposition. This collar Aalso serves the additional purpose of preventingthe bolt from dropping out of the base and cross arm when a damagedinsulator is re-KL moved prior to the installing of a newA in#yksulator.

In the erection of electrical transnnssion\.

lines it is desirable that as much of the equipment as possible beassembled prior to the erection ot the poles. It-is therefore desirablethat the insulator pins be secured in position prior to the erection oi'the poles` It is' also desirable that some means be providcdafter theerection ot the pole whereby the insulators which are to be used may bereadily secured to the pin and then aimed so that the conductorreceiving groove will be in proper alinement with the conductor. Thecollar 8 serves to lock the base member l to the cross .arm prior to theerection of the pole and at the same time does not interfere with therotation of the insulator to properly aline the groove thereof with theconductor and does not interfere with the proper engagement between thethimble l2 and the top surface of the base. j

While we have shown and described one embodiment of our invention itwill be understood that various modifications and changes may be madetherein without departing from the spirit of our invention as set forthin the accompanying claims. y

Having thus described our invention, what we claim as new and desire tosecure by Letters IPatent is:

l. The combination with an insulator support comprising a hollow basemounted upon a cross-arm, a bolt for securing said base in positionl onthe cross-arm screw-threaded at both endsl one end projecting beneaththe cross-arm to receive a nut and the other end projecting above thebase, of an insulator comprising a conductor-carrying member and aninternally screw-threaded thimble screwing on said projectingend of thebolt engaging the top of the base and clamping the base onto thecross-arm, and laterally projecting means on the bolt below the top ofthe base and independent of the insulator for preventing the bolt fromdropping through the arm when the base and bolt alone are assembled onthe cross-arm, said means permitting a free vertical movement of thebolt with respect to the base to allow the insulator to be properlyadjustedlon the base and at the Sametime have its tliimble seat on andclamp the base in position;

2. The combination with an insulator support comprisin a hollow basemounted upon a cross-arm, a lolt for securing said base in position onthe cross-arm screw-threaded at both ends, one end projecting beneaththe cross-arm to receive a nut and the other end projecting above thebase,l of an insulator com risin a conductor-carr in@r member formed ofinsulating material and having a wire receiving groove in the topthereof and an internally screwthreaded thimble serewing on theprojecting end of the bolt engaging the top of the base and clamping thebase onto the cross-arm, and laterally projecting means on the boltbelow the top of the base and independent of the insulator for prelventing the bolt from dropping' through the arm when the base and boltalone are assembled on the cross-arm, said means permitting a freevertical movement of the bolt with respect to the base to allow thegroove in the top of the insulator to be properly alined and at the sametime have the thimble of the insulator seat on and clamp the base inposition.

3. The combination with an insulator support comprising a hollowbasemounted upon a. cross-arm7 a bolt for securing said base in position onthe cross-arm screw-threaded at both ends, one end projecting beneaththe cross-arm to receive a nut and the other end projectingl abovefthebase, of an insulator comprising a conductor-carrying member and aninternally screwthreaded thimblc screwing on the projecting'end of thebolt engaging on the top of thebase and clamping the base onto thecross-arm, and a collar on said bolt arranged to engage a shoulderformed in said base below the top thereof to prevent the bolt fromdropping through 'the base and arm after the bolt and base have beenassembled on the cross-arm, said collar permitting a free verticalmovement of thc bolt with respect to the base to allow the insulator tobe properly adjusted on the base and at the same time have 'its thinibleseat on and clamp the base in position.v

. In witness whereof, we have hereunto subscribed our names in thepresence of two wit;- nesses.

JULUS L. HECHT. JGTHAl'v C. GAPEN.

Witnesses:

J. W. PORTER, A. V. HORN.

